RFR: 8351884: Refactor bug8033699.java test code

[Alexey Ivanov]

On Thu, 17 Apr 2025 16:35:59 GMT, Alexey Ivanov <aivanov at openjdk.org> wrote:

>> Details:
>> Refactored code as requested in the Bug description.
>> 
>> Tested and verified the test passes.
>
> test/jdk/javax/swing/JRadioButton/8033699/bug8033699.java line 301:
> 
>> 299:     private static boolean actRB1 = false;
>> 300:     private static boolean actRB2 = false;
>> 301:     private static boolean actRB3 = false;
> 
> These three boolean variables need to be declared volatile, the value is modified on the EDT but their value is read on the main thread.

You can replace them with `CountDownLatch`es, but it looks like an overkill in this case, moreover `hitKey` automatically invokes `robot.waitForIdle`.

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PR Review Comment: https://git.openjdk.org/jdk/pull/24384#discussion_r2049326782